Research on Flow Behavior of Advanced High Strength Steel at Elevated Temperature

Abstract:

Tensile experiments were carried out on advanced high strength steel (AHSS) by the test machine Gleeble3500, under the temperature ranging from 650 to 850 and the strain rate of 0.1/s~5/s, and the corresponding stress-strain curves were obtained. The peak stress level decreases with the increasing of deformation temperature or the decreasing of strain rate, which can be represented by a ZenerHollomon parameter in a linear equation. A revised model describing the relationships between the peak stress, strain rate and temperature of advanced high strength steel at elevated temperatures was proposed by compensation of strain and strain rate. The comparison of the predicted and experimental results of stressstrain curve can prove the good predictive power of the model, the Adj. R-Square between the peak stress and the linear equation was reached to 0.97.

• Periodical: Materials Science Forum (Volume 749)
• Pages: 498-503
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.749.498
• Online since: March 2013
• Authors: Cheng Xi Lei, Jun Jia Cui, Zhong Wen Xing, Hao Zhao
• Keywords: Advanced High Strength Steel (AHSS), Flow Behavior, High-Temperature, Zener-Hollomon Parameter

References

[1] Hochholdinger, B., Grass, H., Lipp, A., Hora, P., Modeling and determination of flow curves for the simulation of hot forming. International Deep Drawing Research Group IDDRG, Golden, CO, USA, 2009, p.659–669.

[2] Durrenberger, L., Wilsius, J., Hein, P., Impact of the constitutive model on the hot-forming numerical predictions of usibor 1500P. In: 2nd International Conference on Hot Sheet Metal Forming of High-Performance Steel, Luleå, Sweden, 2009, p.51.

[3] J. Bao, H. S. Liu, Z. W. Xing, B.Y. Song. Flow Behavior of Boron Steel for Hot Stamping at Elevated Temperature. Material Science Technology, 210(2010) 2103-2118.

[4] Lechler, J., Merklein, M., Geiger, M. Determination of thermal and mechanical material properties of ultra-high strength steels for hot stamping. Steel Research International, 79, 2 (2009) 98–104.

DOI: 10.1002/srin.200806323

[5] Åkerström, P., Bergman, G., Oldenburg, M., Numerical Implementation of a Constitutive Model for Simulation of Hot Stamping. Materials Science and Engineering, 15 (2007) 105–119.

DOI: 10.1088/0965-0393/15/2/007

[6] Sumantra Mandal, et al. Constitutive Equations to Predict High Temperature Flow Stress in a Ti-Modified Austenitic Stainless Steel. Materials Science and Engineering: A, 500, 1-2(2009) 114-121.

DOI: 10.1016/j.msea.2008.09.019

[7] Dipti Samantaray, Sumantra Mandal, et al. Analysis and Mathematical Modelling of Elevated Temperature Flow Behaviour of Austenitic Stainless Steels. Materials Science and Engineering: A. 528 (2011) 1937-(1943).

DOI: 10.1016/j.msea.2010.11.011